Grapevalor - Innovative strategies for the valorization of grape pomace: anthocyanin extraction, pyranoanthocyanidin synthesis, and energy use with life cycle analysis (LCA)
Innovative strategies for the valorization of grape pomace: anthocyanin extraction, pyranoanthocyanidin synthesis, and energy use with life cycle analysis (LCA)
The GRAPEVALOR project develops innovative strategies for the sustainable valorization of grape pomace as an important by-product in wine production
Using green extraction techniques, the synthesis of stable pyranoanthocyanins, and a comprehensive life cycle assessment (LCA) and technological-economic analysis (TEA), the project comprehensively addresses the valorization of grape pomace as a potential source of bioactive compounds.
Project description:
The GRAPEVALOR project aims to develop innovative strategies for the valorisation of grape pomace, an underutilised by-product of wine production. The project focuses on anthocyanin extraction, pyranoanthocyanin synthesis, and energy valorisation, supported by a comprehensive life cycle assessment (LCA). Grape pomace, a significant waste product of winemaking, represents an opportunity to contribute to the circular economy by converting waste into valuable bioactive compounds and energy sources. The primary objective of the research is to establish sustainable methods for anthocyanin extraction and pyranoanthocyanin synthesis, and to assess the environmental and economic feasibility of these processes.
The project is aligned with the European Union’s Circular Economy Action Plan and the United Nations Sustainable Development Goals, focusing on key challenges related to waste management and reducing the environmental impact of the wine industry. The valorisation of grape pomace can provide high-quality natural pigments for use in food, cosmetics, and pharmaceuticals, while also reducing the environmental burdens associated with waste disposal. Pyranoanthocyanins, derived from anthocyanins, are known for their improved stability to pH, heat, and oxidation, making them suitable for industrial applications as potential natural food colourants.
The research will implement green extraction techniques, such as ultrasound-assisted extraction and microwave-assisted extraction, to optimise efficiency while reducing energy and solvent consumption. An LCA will be conducted to assess the environmental impacts of the extraction and synthesis processes, identify key resource-intensive stages, and propose improvements for sustainable production. In addition, a techno-economic analysis (TEA) will be carried out to ensure the economic feasibility and scalability of the proposed valorisation techniques.
The project is structured around three main pillars: first, conducting a life cycle assessment of wine production to evaluate environmental impacts and gain insights into grape pomace management; second, optimising the extraction of anthocyanins from grape pomace as a source for pyranoanthocyanin synthesis; and third, carrying out LCA and TEA analyses of these processes to assess their scalability and explore the potential use of process residues for energy production compared to raw pomace. The project is divided into five work packages: (1) data collection and life cycle inventory of Slovenian wine production, (2) development and optimisation of methods for anthocyanin extraction and pyranoanthocyanin synthesis, (3) techno-economic assessment and evaluation of the energy potential of grape pomace residues, (4) comprehensive life cycle assessment of wine production and valorisation processes, and (5) project management, dissemination of results, and stakeholder engagement.
By integrating environmental and economic aspects, the project will provide practical insights for winegrowers and wineries in implementing sustainable strategies. The project aims to bridge the gap between research and industry by offering practical solutions that promote circular economy principles and ensure the long-term sustainability and competitiveness of the Slovenian wine sector. The expected results of the project include methodologies for anthocyanin extraction and pyranoanthocyanin synthesis with improved stability and reduced environmental impact. A detailed LCA framework will provide insights into the sustainability of wine production in Slovenia and enable policymakers and industry stakeholders to make informed decisions. The findings will support the implementation of targeted policies, encourage industry collaboration, and stimulate further research in the field of bioactive compound recovery.
Duration: from March 1, 2026, to February 28, 20299
Project coordinator: Rudolfovo – Science and Technology Centre Novo mesto
Consortium partners: University of Nova Gorica, Faculty of Industrial Engineering Novo mesto
Project leader at Rudolfovo: doc. dr. Jelena Topić Božič (jelena.topic.bozic@rudolfovo.eu)
Project value: EUR 450,000
